Valve for controlling the flow of thick pulpy material and the like.



0o 1 9 1 E y K 2 I L l E p H mm T D d N m m w T m m l E T v Yn P9 Ll IEPA EKm TED THD UTE NEH OF HWw 1 '01 in a m. H TN 0 GA N I L L O R T N wI R 0 8 n 3 0 UNITED STATES PATENT OFFICE.

nnwann non Norma,

OF NEW YORK, N Y., ASSIGNOB T0 MINERALS SEPARATION LIMITED, 01 LONDON,ENGLAND.

VALVE FOR ('lONTBOLLING THE FLOW OF THICK PULI'Y MATERIAL AND THE LIKE.

of thick pulpy material or the like.

It is often necessary in dealing with n liquid which has solid mattersuspended in it, to allow the solid matter to settle more or less andthereafter to draw oil the thick pulpy material thereby separatmgit fromthe bulk of liquid.

This invention relates to a valve for con-- trolling the flow of suchthick pulpy material, particularly thickened mineral pulps, thickenedslimes and the like and is specially applicable for the removal ordischarge of thickened mineral pulp or thickened slime pulp fromreceptacles in, which the thickenportions or the solid "portions settleto the bottom. r I

According to this invention a valve for controlling the flow of thethick pulpy petthat the pressure of a head of liquid '1' applied to bothsides of the valve, normally to hold it closed, and so that apredetermined increase of pressure on one to the collection of heavy orthick pulpy material carried in the liquid will open the valve and allowsuch material to pass.

Thus a valve for controlling the flow of thick pulpy material mayconsist inahollow chamber covered with an elastic diaphragm which on oneside presses against the orifice through which the flow is to becontrolled and on the other is so connected by a conduit to the liquidfrom which the pulpy material is being separated that the liquid head isthe same on both sides of the diaphragm.

J In one form of this invention the area of the orifice through whichthe flow is to be controlled is less than the eilective area of pressureon the other side of the elastic diaphragm, whereby when both. sides ofthe diaphragm are under the some liquid head the valve will be normallyclosed by the pros sure of the liquid. 7

Specification of Letters Patent.

Application filed December 4, 1011. Serial Io. 663,900.

elastic material F end of the side due,

Patent ed Sept. 2, 1 913.

The diaphragm or valve is preferably of llldladllbbel' or the like whichreadily yields to the varying pressures and means may be provided foraltering the position of the I .valve in relation to the valve seat forexample by adjusting the hollow chamber. I shall now describe one formof apparatus embodying my invention illustrated in the accompanyingdrawings and shall there-- after point out my invention in claims.

Figure 1 is an elevation, partly in vertical section, of the apparatus.Fig. 2 is an enlarged central vertical section of the valve member andits adjuncts.

At the bottom of the vessel it into which passes the liquid containingsolid or heavy matter in suspension is an extension B at the end ofwhich is formed a alve seat (1 which may simply be the bottom of theopen pipe B and this thick pulp outlet is arranged to discharge thethick pulp into a chamber, launder or the like, D.

Immediately below thevalve seat C is a hollow open-ended box or chamberF. The valve consists of a piece of rubber or like stretched over theopen hot: in close proximity to the valve seat. From the other side ofthe box a pipe G passes through suitable guides and tion of the liquidis arranged in such a way Us connected by a hose or other conduit G to aipe C entering the vessel A containing t liquid from which the pul is-tobe separated. This conduit may ve its upper opening near the surface ofthe liquid to prevent the admission of solid matter" thereto. Thearrangement is such that the liquid head on the under side of thediaphragm is practically the same as the liquid head at the orifice 01'valve seat. I

The area of pressure on the top of the valve is the area of the orificeand ,\t-he eflective area of pressure on the underside of the diaphragmarranged to beslightly greater so that if the apparatus contains liquidonly the valve will be noflnallv closhl it 1 box is provided it so thatthe The under side of the a tclescopeij'oiut H one screw box can beraised or lowered, thus adjusting its position in relation to the valveseat,

Suitable brackets J are provided, fonholding-the various portions of thedevice in the proper relative posit-ions. The'operationof the valve isas iollows The conduit, composed of the pipes 0 Gr and G, leading to theunder side of the diaphragm is first filled with water so that; thevalve will be closed then the liquid containing solid matter insuspension is run into the vessel i\ am] the solid matter or thick pulpsettles in the bottom or into the extension thcreol' l The position ofthe valve is adjusted so that \\ith equal pressure on both sides of the.valve F it is clcsed by the rubbc! 1* bulging out until it comes intoclose contact with the valve-s at. As the solidor thick pulp v materialsettles out from the liquid on the top of the valve, there will be anincrease or pressure on top of the val\e and when this pressure reachesapredeter- -i mined amount, the valve FXvill bcpushed down from its seatand the. thick pulpy matcrial will be allowed to escape into thereccplaclc I placed to catch it. It a suflicientquantit v ot' the thickpulpy materialshculd escape to remove the excess pressure from the topof the valve, the valve will regain its position on the valve seat.Thuseven it the. proportion of solid matter entering with the liquidshould lluctuate. the valve will automatically accommodate itself to thesup-- ply so that the thick pulp will only be discharged when itaccumulates to the desired extent.

in operation the material will be allowed to accumulate to the desireddept-h above the diaphragm, when the valve will be adjusted to dischargewith the material at that depth.

It is obvious that various modifications may be made in the constructionshown and abme particularly described within the principle and scope ofmy invention.

What I claim as my invention and desire to secure by Letters Patent isv 1. A valve for controlling the flow of the hick pnlpy portion of aliquid tln'ongh an orifice, comprising a pulp receptacle having a pulpdischarge orifice, a chamber, an clas tic diaphragm forming atone side apermanent closure for the chamber and adapted atits other side to closethe pulp orifice at the outside. thereof under the pressure of thechamber in opposition to'that from the pulp orifice in the direction ofthe flow of pulp from the receptacle and a conduit connecting thechamber to a head of liquid for pressing the diaphragm against theoutside of the pulp orifice.

' 2. A valve for controlling the (low ot the thick pulpy portion of aliquid through an orifice, comprising a pulp receptacle having a. pulpdischarge orifi e. a chamber. an elastic diaphragm forming at one side apermanent closure for the. chamber and adapted at its other side toclose the pulp oritice at the outside thereof under thoprcssurc ot-thcchamber in opp sition to that from the pulp orifi e in the direction ol'the (low of pulp from the receptacle, the ell'cct'ive area of thediaphragm being greater on the side toward 1 the chamber than on theside adja ent to the pulp orifice. so that with both sides of thediaphragm under the same liquid head theii. valve, for controlling thellow of the thick pulp portion of a liquid through an' orifi e.comprising an elastic diaphragm a1- raugcd to press exlcriorly againstand to close the pulp"oril"i e. a chamberfor which the diaphragm at. itsother side forms a per-- manent closure, \vhcrehv the diaphragm issubjected on the side toward the. chamber to the pres ure of the chamberopposed to that from the pulp oritice. the chamber being arranged t'or:uliustmcnt to and from the pulp orifice to alter the relation of thediaphragm to the pulp orifice, the effective area of the diaphragm beinggi'eater on the side toward the chamber than on the. side adjacent tothe. pulp orifice so that with both sides of the diaphragm under thesame liquid head the diaplu'aginavill be normally "pressed against thepulp orifice to close it, and a conduit connecting the chamber to a headof liquid.

.4. A valve for controlling the flow of the thick pulpy portion of aliquid through an orifice, comprising a chamb r, an elastic diaphragmforming at one side a closure for the chamber and adapted at its otherside to close the pulp orifice under the pressure of the chamber inopposition to that from the pulp orifice. and a conduit connecting thechamber to the head of liquid from which the pulpy portion is suppliedto the pulp ri lice.

A valve for controlling the. flow of the I thick pulp portion of aliquid through an orifice. comprising a chamber. a rubber diaphragmforming at one side a closure for the chamber and adapted at its otherside to close the pulp orifice under the pressure of thechamber inopposition to that from the pulp orifice, amt a conduit connecting thechamber to the head of liquid from which the pulpy portion is suppliedtothe pulp -orifice. I I

't'i. A valve for controlling the flow of the thick pulpy. portion of aliquid through an orifictx cmnprising a chamber, a rubber diaphragmforming at one side a closure for the. chamber and adapted at. its otherside to close' the pulpforifice under the pressure of the chamber inopposition to that from the pulp orifice. the effective area of thediaphragm being greater on the'jside toward the chamber thanon the sideadjacentto the pulp orifice so that'nith bothsides of the diaphragmunder the same liquid head the diaphragm will be normally pressedagainst the orifice to close it, and a orifice, comprising "ii-chamber,a"1 'ubher d aphragm forming at one side a closure Y conduit connectingthe chamber to .the head of liquid from which the PUlPYlJOI'tlOIl issupplied to the pulp orifice.

7 A valve for controlling the flow iof the thick pulpy portion of aliquid" through an ffor the chamber un'cladaptedot its othersideto,close' the pulp orifice under the pres.-

sure of the chamber in opposition to hot "from the pulp orifice, theeffective area of the diaphragm being greater. on the side toward thechamber thanion the sidem cljacenl' to the pulp orifice so that withboth sides of lthe diaphragm underflthe same liquid head the diaphriiginwill be normally pressed against the pulp orifice to .close it,

and a conduit; connecting the chamber 'to the head of-liquid from'whichthe pulpy portion is supplied to the pulp orifice, the chamber beingadjustably connected ivith theconduit so as to permit adjustment of thediaphragm relatively to the orifice.

In testimony whe eof I have signed my I name to. this specification inthe presence of

